Latent S alleles are widespread in cultivated self-compatible Brassica napus

U U Ekuere, I A.P Parkin, C Bowman, D Marshall, D J Lydiate

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13 Citations (Scopus)

Abstract

The genetic control of self-incompatibility in Brassica napus was investigated using crosses between resynthesized lines of B. napus and cultivars of oilseed rape. These crosses introduced eight C-genome S alleles from Brassica oleracea (S16, S22, S23, S25, S29, S35, S60, and S63) and one A-genome S allele from Brassica rapa (SRM29) into winter oilseed rape. The inheritance of S alleles was monitored using genetic markers and S phenotypes were determined in the F1, F2, first backcross (B1), and testcross (T1) generations. Two different F1 hybrids were used to develop populations of doubled haploid lines that were subjected to genetic mapping and scored for S phenotype. These investigations identified a latent S allele in at least two oilseed rape cultivars and indicated that the S phenotype of these latent alleles was masked by a suppressor system common to oilseed rape. These latent S alleles may be widespread in oilseed rape varieties and are possibly associated with the highly conserved C-genome S locus of these crop types. Segregation for S phenotype in subpopulations uniform for S genotype suggests the existence of suppressor loci that influenced the expression of the S phenotype. These suppressor loci were not linked to the S loci and possessed suppressing alleles in oilseed rape and non-suppressing alleles in the diploid parents of resynthesized B. napus lines.
Original languageEnglish
Pages (from-to)257-265
Number of pages9
JournalGenome
Volume47
Issue number2
DOIs
Publication statusPrint publication - 2004
Externally publishedYes

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Brassica napus
allele
Alleles
alleles
phenotype
Phenotype
genome
loci
Genome
cultivar
1-phenyl-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline
self incompatibility
Brassica rapa
Haploidy
Brassica
genetic marker
testcrosses
subpopulation
Diploidy
Genetic Markers

Cite this

Ekuere, U. U., Parkin, I. A. P., Bowman, C., Marshall, D., & Lydiate, D. J. (2004). Latent S alleles are widespread in cultivated self-compatible Brassica napus. Genome, 47(2), 257-265. https://doi.org/10.1139/g03-120
Ekuere, U U ; Parkin, I A.P ; Bowman, C ; Marshall, D ; Lydiate, D J. / Latent S alleles are widespread in cultivated self-compatible Brassica napus. In: Genome. 2004 ; Vol. 47, No. 2. pp. 257-265.
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abstract = "The genetic control of self-incompatibility in Brassica napus was investigated using crosses between resynthesized lines of B. napus and cultivars of oilseed rape. These crosses introduced eight C-genome S alleles from Brassica oleracea (S16, S22, S23, S25, S29, S35, S60, and S63) and one A-genome S allele from Brassica rapa (SRM29) into winter oilseed rape. The inheritance of S alleles was monitored using genetic markers and S phenotypes were determined in the F1, F2, first backcross (B1), and testcross (T1) generations. Two different F1 hybrids were used to develop populations of doubled haploid lines that were subjected to genetic mapping and scored for S phenotype. These investigations identified a latent S allele in at least two oilseed rape cultivars and indicated that the S phenotype of these latent alleles was masked by a suppressor system common to oilseed rape. These latent S alleles may be widespread in oilseed rape varieties and are possibly associated with the highly conserved C-genome S locus of these crop types. Segregation for S phenotype in subpopulations uniform for S genotype suggests the existence of suppressor loci that influenced the expression of the S phenotype. These suppressor loci were not linked to the S loci and possessed suppressing alleles in oilseed rape and non-suppressing alleles in the diploid parents of resynthesized B. napus lines.",
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Ekuere, UU, Parkin, IAP, Bowman, C, Marshall, D & Lydiate, DJ 2004, 'Latent S alleles are widespread in cultivated self-compatible Brassica napus', Genome, vol. 47, no. 2, pp. 257-265. https://doi.org/10.1139/g03-120

Latent S alleles are widespread in cultivated self-compatible Brassica napus. / Ekuere, U U; Parkin, I A.P; Bowman, C; Marshall, D; Lydiate, D J.

In: Genome, Vol. 47, No. 2, 2004, p. 257-265.

Research output: Contribution to journalArticleResearchpeer-review

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AB - The genetic control of self-incompatibility in Brassica napus was investigated using crosses between resynthesized lines of B. napus and cultivars of oilseed rape. These crosses introduced eight C-genome S alleles from Brassica oleracea (S16, S22, S23, S25, S29, S35, S60, and S63) and one A-genome S allele from Brassica rapa (SRM29) into winter oilseed rape. The inheritance of S alleles was monitored using genetic markers and S phenotypes were determined in the F1, F2, first backcross (B1), and testcross (T1) generations. Two different F1 hybrids were used to develop populations of doubled haploid lines that were subjected to genetic mapping and scored for S phenotype. These investigations identified a latent S allele in at least two oilseed rape cultivars and indicated that the S phenotype of these latent alleles was masked by a suppressor system common to oilseed rape. These latent S alleles may be widespread in oilseed rape varieties and are possibly associated with the highly conserved C-genome S locus of these crop types. Segregation for S phenotype in subpopulations uniform for S genotype suggests the existence of suppressor loci that influenced the expression of the S phenotype. These suppressor loci were not linked to the S loci and possessed suppressing alleles in oilseed rape and non-suppressing alleles in the diploid parents of resynthesized B. napus lines.

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